#include<stdio.h>

int main()
{
    int year = 0;
    printf("请输入年份：\n");
    scanf("%d",&year);
    if((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
        printf("%d是闰年。\n",year);
    else
        printf("%d不是闰年。\n",year);
    return 0;
}

